无线接口刚刚消失

Question

不知从哪冒出来的，无线网络停止了我的笔记本电脑华硕UX433FA的工作。wifi适配器不再被Ubuntu所识别，我在网络管理器中没有看到它。

sudo lshw -C network的输出：

*-network                 
       description: Network controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       version: 30
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list
       configuration: driver=iwlwifi latency=0
       resources: irq:16 memory:b121c000-b121ffff
  *-network
       description: Ethernet interface
       physical id: 1
       logical name: enp0s20f0u2
       serial: 3e:f8:7b:1f:3c:05
       capabilities: ethernet physical
       configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.48 link=yes multicast=yes

再也没有Wifi interface了！

ifconfig显示：

enp0s20f0u2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.42.48  netmask 255.255.255.0  broadcast 192.168.42.255
        inet6 fe80::f7e2:9b19:30ff:2b48  prefixlen 64  scopeid 0x20<link>
        ether 3e:f8:7b:1f:3c:05  txqueuelen 1000  (Ethernet)
        RX packets 20655  bytes 21508840 (21.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 14725  bytes 2205670 (2.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 4190  bytes 916540 (916.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4190  bytes 916540 (916.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

互联网接入是由我的手机作为USB热点，但这里没有提到Wifi。我已经执行了强制性的多次重新启动，一切都是最新的。

注意:笔记本电脑有双启动窗口，windows也看不到我的wifi卡。

我的wifi卡被烧掉了？

编辑:这是sudo modprobe iwlwifi && dmesg | grep -e iwl -e 14.3的输出

[    0.014855] ACPI: DSDT 0x0000000099C6B228 0414D3 (v02 _ASUS_ Notebook 01072009 INTL 20160527)
[    0.127801] Memory: 16067824K/16587220K available (14339K kernel code, 2335K rwdata, 4316K rodata, 2584K init, 5196K bss, 519396K reserved, 0K cma-reserved)
[    0.142353] NR_IRQS: 524544, nr_irqs: 2048, preallocated irqs: 16
[    0.143300] DMAR: RMRR base: 0x00000099f58000 end: 0x0000009a1a1fff
[    0.143301] DMAR: RMRR base: 0x0000009b800000 end: 0x0000009fffffff
[    0.143302] DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
[    0.143302] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[    0.143303] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
[    0.299218] pci 0000:00:14.3: [8086:9df0] type 00 class 0x028000
[    0.299241] pci 0000:00:14.3: reg 0x10: [mem 0xb121c000-0xb121ffff 64bit]
[    0.299334] pci 0000:00:14.3: PME# supported from D0 D3hot D3cold
[    0.331463] PCI: Using ACPI for IRQ routing
[    1.690595] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[    1.727673] iwlwifi 0000:00:14.3: loaded firmware version 43.95eb4e97.0 op_mode iwlmvm
[    1.768088] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9460, REV=0x318
[    1.778373] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[    1.778379] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[    1.778405] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x23, CPU2 Status: 0x0
[    1.778409] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[    1.778412] iwlwifi 0000:00:14.3: Collecting data: trigger 15 fired.
[    2.001362] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5

哇:似乎还能找到wifi卡，但是有一个Microcode SW error detected！能告诉我怎么解决这个问题吗？

编辑2:我的笔记本电脑的型号受到微码更新的影响，这使得它无法在Ubuntu18.04上启动。请看这个帖子：更新后Ubuntu18.04.2引导卡在紫色屏幕上，两天前有一个关于这个主题的更新。现在看来，我现在可以正常地引导Ubuntu，而无需在GRUB中使用dis_ucode_ldr选项，而我必须手动添加这个选项才能重新启动。请继续关注这是否有帮助。

编辑3:我能够应用新的BIOS更新，删除grub中取消cpu微代码的行，并将微代码更新为最新版本。然而，这并没有解决问题。事实上，我现在无法通过USB连接互联网，一旦我登录。

Answer 1

通过运行sudo modprobe iwlwifi && dmesg | grep -e iwl -e 14.3，我注意到内部无线网卡的微码有问题。这是不容易解决的，硬件将不得不更换。

使用外部wifi软线作为临时替代。